It's not an aircraft propeller. It's almost certainly a wind generator or air circulator as you often see in vineyards in California and elsewhere. The three hole hub, particularly with the propeller length, would not be consistent with any aircraft application.

The metal sheathing is a little unusual for that application. I'm not really sure why it's there.

Thanks very much for the reply, takes the mystery out of it for me. I was thinking along the same lines as that but when I seen the "Propeller Inspection" sticker on it it had me thinking otherwise. Thanks very much!